Numerical Investigation of the Impact of H2 Enrichment on Lean Biogas/Air Flames: An Analytical Modelling Approach

The transition from natural gas to renewable gases such as biogas and hydrogen creates an interchangeability challenge. laminar flame speed SL is a critical parameter in appliance design it unique characteristic of the mixture. It thus essential evaluate impact on SL. In this work, 1D simulations were conducted Cantera with USC-Mech 2.0 kinetic mechanism. three base blends (BG100, BG90 BG80) was computed for H2 enrichment up 50% volume, equivalence ratio 0.8≤ϕ≤1.0, p=1 atm Tu=298 K. found that effect higher CO2 content thermal-diffusive dilution effects carbon dioxide are mitigated by hydrogen. introduction also increases H radical pool, which linked increase A new correlation model enrichment, SL(xH2)=ζ(ϕ)/SL′(xCO2)xH2exH2+SL′(xCO2), proposed, exhibits good agreement literature data simulations. This equation can be directly used estimate without need priori adaptations fit parameters contributions isolated independent variables.